Means for adjustably securing pulleys to shafting.



' UNITED PATENT OFFICE DAVID FOUST STAYMAN, OF BALTIMORE, MARYLAND. MEANS FOR ADJUSTABLY ASEGUILHJG PULLEYS T0 SHAFTING.

Patented Sept. 18, 1906.'

Application led December 7. 1905. Serial No. 290.717.

To @ZZ whom it may; concern.-

Be it. known that I, DAvin FoUs'r STAY- MAN, a citizen of the United States, residing at Baltimore, in the State of Maryland, have invented certain new and useful Improvements in Means for Adjustably Securing Pulleys or other Rotating Bodies to Shafting, of w ich the following is a specification.

My invention re ates to. improvements in means for adustably securin pulleys, armatures, and ot er rotating bo ies to shaftin The object of the invention is to rovi e an improved construction of device t at Will enable pulleys and other rotating bodies to be accurately mounted on shafting so that said bodies may be revolved in a true circular path with respect to said shaft.

The invention is illustrated in theaceompanying drawings, in Which- Figure 1 shows a cross-sectional elevation through a pulle cured to a sha t by my improved devices, and Fig. 2 is an end elevation ofthe same.

`Referring to the drawings by numerals, 1 designates a shaft which bis provided with a smooth portion 2 and having screw-threaded portions 3 and 4 at opposite ends of said smooth portion. Said shaft is also provided with a oove or key-seat 5, which extends longitu inally therein between said threaded portions. l I

ThVI pulley or otherrotating body 6 has a width substantiall eq'ual to t e smooth portion 2 of the shafii, and said lplulley has an opening orbore 7, through W leh the shaft extends freely. At opposite sides and around the openin or bore the pulley is rovided with cone-s iaped openin s 8, W ich extend from the outer surface 9 o the pulley, where they are of the largest-diameter, toward a omt adjacent the smooth portion of the shaft where their diameters are smallest.

A key-seat 10 is also provided in the pulley or other bodv which extends crosswise thereof between the cone-shaped o enings 8 and a key \11 fits in the seats 5 an 10 and locks Whi e the pulley or other bo or other body which is se-` 'tween said threaded ulley and shaft in rotary engagement. dy is thus locked in rotary engagement with the shaft, it yet remains to provide means whereby the pulley may be roperly adjusted or set on the shaft, so that t e pulley will revolve in a true circulai` path without wabble, and in order to make this adjustment quickly and accurately I provide a split-cone bushing 12, having a central opening 13 to fit snugIy around the shaft with its smaller or point end 14 innermost and entering the cone-shaped opening 8 in the side of the pulley. Of course two bushings are employed. A nut 15 is then sli pedo on the shaft, one at each side of the pu ley, and these engage with the threaded portions 3 and 4 of the turning the nuts the cone-bushin s will be driven into the side openings 8 of t e ulley. By tightening the nut at one side of t 1e pulley and loosening the nut at the opposite side the most delicate adjustment of t e pulley on the shaft may be obtained.

Having thus described my invention, I claim as new, and desire to secure by Letters Patent, is

In a device of the character described the combination of a shaft provided with a smooth portion and with screw-threaded portions at opposite ends of said smooth portion, and having a key-seat inthe smooth portion beortions; a pulley or body on said shaft and aving a central opening with a key-scat therein and also having a cone-shaped opening at each side of the keyseat; a key iii said tw'o key-seats: a conebushing in each of said side ollwnings, and nuts engaging the threads on t ic shaft and pressingagainst the bushings for forcing the atter into said cone-openings.

In testimony whereof I affix my signature in presence of two witnesses.

DAVID FOUST STAYMAN.

Witnesses:

` EDWARD P. GILonms'r,

ELIsAnE'rn M. WYNKooP.

the

shaft, and by then SIC 

